Bài tập 2: Hoàn thành câu sử dụng những từ cho dưới đây. Sử dụng a/an khi cần thiết. accident, biscuit, blood, coat, decision, electricity, key, letter, moment, music, question, sugar 1. It wasn't your fault. It was........... 2. Listen!can you hear...........? 3. I couldn't get into the house because I didn't have ........... 4. It's very warm today. Why are you wearing...........? 5. Do you take .................in your coffee? 6. Are you hungry? Would you like ...........with your coffee? 7. Our lives would be very difficult without................ 8. I didn't phone them. I wrote.............instead. 9. The heart pumps .....................through the body. 10. Excuse me, but can I ask you.............? 11. I'm not ready yet. Can you wait.............., please? 12. We can't delay much longer. We have to make .................soon. Bài tập 3: Viết sang số nhiều những từ trong ngoặc đơn 1. Study the next three (chapter). 2. Can you recommend some good (book)? 3. I had two (tooth) pulled out the other day. 4. You can always hear (echo) in this mountain. 5. They are proud of their (son-in-law). 6. Did you raise these (tomato) in your garden? 7. I think we need two (radio). 8. My (foot) really hurt. 9. The (roof) of these houses are tiled. 10. Get me two (loaf) of bread.